463 Birge — Vertical Distribution of Pelagic Crustacea, 



Table — Vertical distribution by periods. 

 Period I— July 7-34. 



Depth 



Average. 



Day. 



Night. 



Meters. 



No. 



Per cent. 



No. 



Per cent. 



No. 



Per cent. 



0—3 



3—6 



119 

 73 

 63 

 44 

 10 

 3 



312 



38.14 

 23.4 

 20.19 

 14.10 

 3.20 

 97 



105 



73 



70 



33 



4 



3 



36.4 

 25.3 

 24.3 

 11.5 

 1.4 

 1.0 



[137 

 73 

 56 

 58 

 15 

 3 



40.0 

 21 3 



6—9 



9—12 



16.4 



17 



12—15 



15—18 



4.4 

 .9 



Total 



238 





342 











Period II.— July 16-19. 



Depth. 



Average. 



Day. 



Night. 



Meters. 



No. 



Per cent. 



i 



No. 



Per cent. 



No. 



Per cent. 



0—3 



61 



47 



31 



5 



1 





 145 



42.0 



32.4 



21.4 



3.5 



.7 

 



62 



50 



24 



3 











44.6 



36 



17.3 



2.2 











58 



42 



42 



7 



1 







38 3 



3—6 



28.0 



6—9 



28.0 



9—12 



4.7 



12—15 



15—18 



.7 

 







Total . 



139 





150 











Period III.— July 27-29. 



Depths. 



Average. 



Day. 



Night. 



Meters. jfc: 



No. 



Per cent. 



No. 



Per cent. 



No. 



Per cent. 



0—3 



123 



95 



49 



4 



3 







44.9 



34.7 



17.9 



1.5 



1.1 







101 



08 



36 



5 











48.09 



32.4 



17.1 



2.4 











146 



118 



61 



3 







1 



44.4 



3—6 



6—9 



9—12 



35.9 



18.5 

 .9 



12—15 







15—18 



.3 







Total. 



274 



. . . . ; ( 



210 





1 329 









